Gear Metering Pump For Negative-pressure Discharge

Capable of withstanding extremely high vacuum at the inlet, the pump continuously transfers material from the high-vacuum chamber to the atmospheric-pressure side without breaking the vacuum, thereby maintaining the system's vacuum stability.

Wetted parts are primarily constructed from 316L stainless steel, with options for thermal insulation jackets and leak-free magnetic couplings. Suitable for high-temperature, medium-to-high viscosity, and heat-sensitive materials, the pump is widely used in processes involving the discharge of light and heavy fractions in short-path molecular distillation, thin-film evaporation, and vacuum purification.

Features
1. High-Vacuum Suction Capability: The inlet accommodates the extreme negative pressure conditions of molecular distillation, enabling continuous discharge from vacuum to atmospheric pressure without breaking the vacuum; this ensures separation efficiency and supports 24-hour continuous operation.
2. High-Precision Positive Displacement Metering: Flow rate is linearly proportional to rotational speed, ensuring high metering repeatability; precise control of discharge flow and distillation film thickness-achieved via variable frequency or servo speed regulation-enhances separation and purification performance.
3. Optional High-Temperature Jacket Design: The pump body features a thermal insulation jacket to prevent high-melting-point materials from cooling, solidifying, and causing blockages; it is designed for high-temperature molecular distillation conditions, with an operating temperature rating of up to 300°C.
4. Reliable Sealing Solutions: A magnetically driven, leak-free design is preferred for high-temperature applications to prevent air leakage on the vacuum side; alternatively, a metal bellows seal can be configured to completely eliminate media leakage and air backflow that could compromise system vacuum.
5. Suitable for Medium-to-High Viscosity Materials: Ideal for heat-sensitive and high-viscosity materials, providing pulse-free, steady discharge; capable of handling silicone oil, plant extracts, fish oil, synthetic intermediates, hot polymers, and more.
6. Strong Process Compatibility: Can serve as a feed pump or a discharge pump (for light or heavy fractions) in molecular distillation equipment, integrating seamlessly with complete automated control systems for short-path distillation.

Applicable Media
Silicone oil, fish oil, plant essential oils, heat-sensitive organic intermediates, high-melting-point synthetic materials, biodiesel, crude glycerin, and various distillation/purification feedstocks.

Application Industries
1. Short-path / Molecular Distillation: Continuous vacuum discharge of light and heavy fractions; suitable for laboratory, pilot-scale, and industrial molecular distillation systems.
2. Fine Chemicals: Vacuum distillation and purification of heat-sensitive materials.
3. Biopharmaceuticals & Health Supplements: Low-temperature separation of active substances.
4. Petrochemical Recycling: Vacuum distillation of waste oil and thin-film evaporation processes.

FAQ:

Q1: Can it work under molecular distillation high vacuum condition?

A: Yes. Specially designed for short‑path molecular distillation, it can transfer medium from high vacuum chamber to atmospheric side without breaking system vacuum.

Q2: Can this pump handle high‑melting‑point material?

A: Yes, jacket heating version is available to prevent medium solidification inside pump head.

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